EF one-to-one relation not creates - entity-framework

Question

I'll try create one-to-one relation using EF and Fluent API.
First class:
public class Game
{
public int Id { get; set; }
public Guid Token { get; set; }
public string Player { get; set; }
public virtual Field Field { get; set; }
public virtual ICollection<Move> Moves { get; set; }
public GameStatus Status { get; set; }
public DateTime StartTime { get; set; }
public DateTime? EndTime { get; set; }
public PlayerCode Winner { get; set; }
public Game()
{
Status = GameStatus.NoteDone;
StartTime = DateTime.UtcNow;
Winner = PlayerCode.None;
Field = new Field {Game = this};
Token = Guid.NewGuid();
}
}
Secong class:
public class Field : IEntity
{
public int Id { get; set; }
public virtual Game Game { get; set; }
public string CellsString { get; set; }
}
And configure relations in context
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Game>()
.HasRequired<Field>(g => g.Field)
.WithRequiredDependent(f => f.Game);
base.OnModelCreating(modelBuilder);
}
But after this relation in DB is not created. Tables look like this
I try many variations of Fluent configuration, but no one works for me. Where i do mistake?

Answer 1

You can specify a mapping for foreign key if you don't wish to add it as a property to your entity class.
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Entity<Game>()
.HasRequired(g => g.Field)
.WithRequiredPrincipal(f => f.Game)
.Map(m => m.MapKey("GameId"));
}
You probably meant WithRequiredPrincipal, not WithRequiredDependent since you probably want that foreign key to be in the Field table.